Circulating heating stove



May 8, 1934. M. G. KLEMME CIRCULATING HEATING STOVE Filed Aug. 25, 1932 Patented May 8, 1934 UNITED STATES PATENT OFFICE CIRCULATING HEATING STOVE poration of Illinois Application August 25, 1932, Serial No. 630,330

6 Claims.

This invention relates principally to circulating heating stoves of the type wherein preheated air is introduced into the combustion chamber to insure a more perfect combustion of the fuel. It has for its principal object to better provide for the preheating of the air and the introduction thereof to the zone of combustion. Other objects are simplicity and economy of construction and compactness of design. The invention consists in the circulating heating stove and in the combination and arrangement of parts hereinafter described and claimed.

In the accompanying drawing, which forms 5 part of this specification and wherein like reference numerals refer to like parts wherever they occur.

Fig. 1 is a perspective view of a circulating heating stove embodying my invention, with 0 the fire door removed and the upper part of the stove shown broken away to disclose the air inlet tube and the baffles for the exhaust gases,

Fig. 2 is a vertical section through the upper 5 portion of the stove on the line 2-2 in Fig.

3; and

Fig. 3 is a horizontal section on the line 3-3 in Fig. 2.

Referring to the accompanying drawing, my

0 invention is shown in connection with a circulating heating stove comprising a base 1 supported on legs 2 and containing an ash pit, to which access may be had by means of a door 3. in the front wall of said base. A suitable 5 fire pot 4 is located above the ash pit and communicates with the bottom of a combustion chamber 5, which communicates at its upper end with a chamber 6 for heating air that is introduced into the upper portion of said combustion chamber. The front wall of the combustion chamber 5 is provided with the usual fire door 7; and a smoke outlet or exit flue 8 leads horizontally from the rear wall of the air heating chamber.

An air inlet tube 9 passes vertically and centrally through the air heating chamber 6 of the stove and communicates at its lower end with a cross-tube 10, which extends substantially the full width of the combustion chamber 5 and is provided with a series of longitudinally spaced discharge openings 11 that open downwardly into the upper portion of said combustion chamber. The cross-tube 10 is preferably formed integral with the partition 12 that separates the combustion chamber 5 from the air heating chamber 6 located thereabove. The upper end of the air inlet tube is provided with a suitable damper 13 for controlling the admission of air to said tube.

The air heating chamber 6 is provided on opposite sides of the air inlet tube 9 with vertical bafiie plates 14 that are located substantially in line with the side walls of the smoke outlet or exit flue 8 and extend forwardly from the rear wall of said chamber to points substantially in line with the vertical axis of said air inlet tube. The partition 12, which separates the air heating chamber 6 from the combustion chamber 5, is provided with openings 15 for establishing communication between said chambers, said openings being located rearwardly of the front edges of the bafiie plates 14 between the outer faces thereof and the side walls of said chambers.

By the arrangement described, air is drawn downwardly through the air inlet tube 9 into the cross-tube 10 and thence through the openings 11 in the bottom of said cross-tube into the upper portion of the combustion chamber 5. The air before entering the combustion zone is preheated by the products of combustion, which are given a circuitous course to the exit flue 8 by means of the retarding or bafile plates 14, the products of combustion passing upwardly through the openings 15 into the air heating chamber 6, thence forwardly over the top of the cross-tube 10 and thence rearwardly between said bafiie plates and the air inlet tube 9 to said exit flue; and the air thus heated is uniformly distributed by the cross-tube 10 throughout the entire width of the combustion chamber 5.

Obviously, the hereinbefore described circulating heating stove admits of considerable modification without departing from my invention. Therefore, I do not wish to be limited to the precise construction or type of stove shown and described.

What I claim is:

1. A circulating heating stove comprising a combustion chamber, an air heating chamber above said combustion chamber, said stove having a partition separating said chambers, an exit fiue leading horizontally from the rear Wall of said air heating chamber, and an air inlet tube passing vertically and centrally through said air heating chamber and communicating at its lower end with said combustion chamber, said partition being provided on opposite sides of said exit flue with openings for establishing communication between said combustion chamber and said air heating chamber, and said air heating chamber being provided with baflies extending between said air inlet tube and said openings.

2. A circulating heating stove comprising a combustion chamber, an air heating chamber above said combustion chamber, said stove having a partition separating said chambers, an exit flue leading horizontally from the rear wall of said air heating chamber, a cross-tube extending horizontally across the top of said combustion chamber and having a series of longitudinally spaced apertures opening into said combustion chamber, and an air inlet tube passing vertically and centrally through said air heating chamber and communicating at its lower end with said cross-tube, said partition being provided on opposite sides of said exit flue with openings for establishing communication between said combustion chamber and said air heating chamber, and said air heating chamber being provided with baflies extending between said air inlet tube and said openings.

3. A circulating heating stove comprising a combustion chamber, an air heating chamber above said combustion chamber, said stove having a partition separating said chambers, an exit flue leading horizontally from the rear wall of said air heating chamber, an air inlet tube passing vertically and substantially centrally through said air heating chamber and communicating at its lower end with said combustion chamber, and vertically disposed bafile plates extending from the rear wall of said air heating chamber on opposite sides of said air inlet tube, said partition having openings for establishing communication between said combustion chamber and said air heating chamber, said openings being located rearwardly of said air inlet tube.

4. A circulating heating stove comprising a combustion chamber, an air heating chamber above said combustion chamber, said stove having a partition separating said chambers, an exit flue leading horizontally from the rear wall of said air heating chamber, and an air inlet tube passing vertically and substantially centrally through said air heating chamber and communieating at its lower end with said combustion chamber, said partition having openings located on opposite sides of said exit flue for establishing communication between said combustion chamber and said air heating chamber, said openings being located rearwardly of said air inlet tube, said heating chamber being provided with baflle plates that extend forwardly from the rear wall of said air heating chamber between said air inlet tube and said openings.

5. A circulating heating stove comprising a combustion chamber, an air heating chamber above said combustion chamber, said stove having a partition separating said chambers, an exit iiue leading horizontally from the rear wall of said air heating chamber, an air inlet tube passing vertically and centrally through said air heating chamber, said partition being provided on opposite sides of said exit flue with openings for establishing communication between said chambers, vertically disposed baffle plates located between said openings and said air inlet tube and extending forwardly from the rear wall of said air heating chamber and terminating short of the front Wall of said air heating chamber, and a cross-tube communicating with the lower end of said air inlet tube and extending substantially the full width of said combustion chamber, said cross-tube being provided with a plurality of openings that open downwardly into the upper portion of said combustion chamber.

6-. A circulating heating stove comprising a combustion chamber, an air heating chamber above said combustion chamber, said stove having a partition separating said chambers, an exit flue leading horizontally from the rear wall 01. said air heating chamber, an air inlet tube passing vertically and centrally through said air heating chamber, a horizontal tube formed integral with said partition and extending substantially the full width of said combustion chamber, said cross-tube communicating with the lower end of said air inlet tube and being provided with a plurality of openings that open downwardly into said combustion chamber, openings in said partition located on opposite sides of said exit flue between said cross-tube and the rear wall of said air heating chamber for establishing communication between said chambers, and vertically disposed baffle plates extending from the rear wall of said air heating chamber on opposite sides of said air inlet tube.

MAURICE G. KLEMME. 

